My GK MBF800 arrived today in the big purple truck. It's currently sitting where my MarkBass LM III used to sit plugged into my MarkBass NY121. (The LMIII and NY121 is my home practice rig) My GB Shuttle 9.0 is plugged into a pair of Bergantino HD112's. (my stage rig) I played around with them for about an hour, and WOW!!! The MBF 800 is a monster!! I swapped the MBF800 and the S9.0 in and out of the Bergs, and they both sound REALLY good! It was getting late, so I didn't really turn them up and let them breath. Plus my Bergs are buried in the corner of my room; not an optimal placement. But at clean home volume, the two sounds really close. I can't wait to take the MBF800 out to hear how it sounds at stage volume compared to the S9.0. OK, I admit, an 800 watt amp is a little ridiculous for a home practice amp. But, you gotta admit; It's a REALLY cool idea!